Welcome, I've had my wizard for two years flashed 5 or 6 roms, "its right" make good stable rom packed with useful software. I would suggest you read lots about any rom you install as if there are any problems its reported and usually fixed in rom thread.
If I might suggest Jaguar 4.0 rom, it is very stable and only a few programs leaving lots of space for you to test and add programs of your choice, you will want to try different programs. Some you stick with others will not be of use to you, the fun is in trying new things.
If you feel a little braver try the rom in my signature, I've had a few teething troubles but nothing major, anyway I can always change back.
Keep operator settings and instructions to hand, to make it easier when flashing, I also keep a list of installed apps so it is easier next time to remember what I use most often.
Finally welcome, there's now turning back now, it's addictive you know!
Changed phone to LG-GM750
Don't have time to personalize phone but reasonable happy with it.